CARB Compliance Issues- A Deeper Look at Low Rolling Resistance Tires

If you drive a box type trailer in California (including dry van and refrigerated van trailers) you likely are aware of the low rolling resistance tire regulations that are currently being phased in. What you might not know however is how these tires work and how using them impacts you. Keep reading for all the details, including tips for maximizing your tire investment.

What Are Low Rolling Resistance Tires?

Low rolling resistance (LRR) tires are a special type of tire designed to improve fuel efficiency by reducing the rolling resistance. They are required for certain trailers and tractors as part of California’s Heavy Duty Vehicle Greenhouse Gas Emission Reduction Regulation. As tires move on the road, this resistance turns energy exerted by a vehicle into heat, not forward movement, and can result in a great deal of energy waste. For heavy trucks it is estimated that up to 15-30% of fuel consumption is used to overcoming rolling resistance. LRR tires cut down on this resistance saving money in fuel costs and cutting down on greenhouse gasses.

While required for some tractors and trailers in California, LRR tires can be used anywhere in the country to cut down on fuel expenses.

How Much of an Impact Do LRR Tires Make?

LRR tires can make a big impact on your fuel efficiency. Some studies indicate that making the change to LRR tires could save (each year):

  • 500 Gallons in Fuel
  • 08 metric tons of CO2
  • $1,900 in Fuel Costs
  • 3% Reduction in Fuel Costs

LRR tires may wear out more quickly than standard tires. The full impact you’ll experience will vary depending on the type of tire you choose, whether you have single wide or double tires, and even how your tires are inflated. LRR tires may be more expensive (between $0 and $50 per tire), but most estimates suggest that the increase in fuel efficiency will offset the increase in tire price.

Other Methods for Improving Your Fuel Efficiency

Do you want to get the most bang for your fuel investment? LRR tires can cut down on your fuel bill, but there are other steps you can take to maximize your tire investment and to increase your fuel efficiency when using LRR tires. Here are a few tips:

  • Inflate Properly- Making sure your tires are properly inflated can make a big difference in your fuel efficiency. For example if your recommended inflation is 35 psi, but your actual inflation is only 28 psi, your rolling resistance will be increased by 12.5%.
  • Use LRR Tires for All Tires- Although incremental fuel efficiency increases can be obtained by using LRR tires on just the tractor or trailer, you’ll see the best results when you use LRR tires for all tire positions.
  • Choose SmartWay Approved Tires- SmartWay approved tires are verified by the EPA to meet specific fuel efficiency requirements. See a list of approved LRR tires here.

Are you using LRR tires? Have you noticed an impact on your fuel bill?

 

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